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9 Troubleshooting and
Maintenance
9.1 Troubleshooting
9.1.1 Troubleshooting of LED Indicators
See “
Tab. 7-5 State Descriptions of the LED Indicator
” for the definition.
Fault Type
Troubleshooting
The LED indicator and LCD
screen cannot be lit.
1. Disconnect the AC circuit breaker.
2. Rotate the DC Switch to “OFF”.
3. Check the polarities of the DC inputs.
The LED indicator goes out.
1. Disconnect the AC circuit breaker.
2. Rotate the DC Switch to “OFF”.
3. Check the electrical connection.
4. Check whether the DC input voltage
exceeds the start voltage of the inverter.
5. If all of the above are OK, please contact
SUNGROW.
The LED indicator is lit red.
1. A fault is not resolved.
2. Perform troubleshooting according to the
fault type on the LCD screen. See “
3. If it cannot be resolved, please contact
SUNGROW.
9.1.2 Troubleshooting of the Errors
When faults occur, the “Fault” state will be shown on the main screen.
Press
to view all the fault information. For the detailed troubleshooting, see the
chapter “
Troubleshooting of the Errors
” in the quick user manual.
For the battery error codes, if all the conditions are OK but the fault
still occurs, contact the distributor or the battery manufacturer.
We need the following information to provide you with the best
assistance: inverter type (e.g. string, central, grid-connected,
hybrid, transformerless, single phase, triple phase, single MPPT,
multiple MPPTs), or product name, serial number of the inverter,
error code/name, and a brief description of the issue.
